The opposite of TL; DR, standing for "Too Short; Read Everything." A demand for more, expression of accolades toward a body of text or a way to say kudos. Appropriately used, positively, when a body of text is worth reading all of, regardless of the length.
In reply to a comment: "TS; RE"
"Nice post, ts; re!"
"That novel was so good! TS; RE!"